Connecting Power Fail Transfer; Figure 3.24 Connecting A Shunting Phone Line For Power Failure Protection - Samsung OfficeServ 7200 Installation Manual

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3.4 Connecting Power Fail Transfer

If AC power fails while battery is not connected, connect a power fail transfer circuit by
connecting C.O. lines to extensions.
When using the 8TRK2/16TRK for the trunk board and the 8SLI2/8SLI3/8COMBO3
/16SLI2/16SLI3 for the local board, connect pins 7 and 8 of the first port of the
8TRK2/16TRK to pins 7 and 8 of the 8SLI2/8SLI3/8COMBO3/16SLI2/16SLI3, as shown
in the figure below. Then the line is connected to a general telephone through pins 7 and 8
of the 8TRK2/16TRK. If a power failure occurs, the trunk line is connected directly to the
telephone connected to pins 4 and 5 through pins 7 and 8 of the 8SLI2/8SLI3/8COMBO3
/16SLI2/16SLI3 by the operation of an internal relay and thus emergency calls can be made.
The 16SLI3 for the local board has power fail transfer circuit, connection pins 7 and 8 of
the first port and the 8th port.
8 7

Figure 3.24 Connecting a Shunting Phone Line for Power Failure Protection

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8 7
8TRK2 16SLI2
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